Stars and galaxies

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Across
  1. 3. another word for the closeness of an object.
  2. 4. a scientist who studys the stars.
  3. 8. the name of the galaxy that Earth belongs to.
  4. 9. the force that keeps all the planets in orbit around the sun.
  5. 10. the type of galaxy that has no definite shape.
Down
  1. 1. the process where plants use the energy from the sun to make food.
  2. 2. a hot ball of burning gas that gives off heat and light.
  3. 5. the name of the star at the center of the solar system.
  4. 6. the type of galaxy that has older stars and has an elipse shape (like a long oval).
  5. 7. Made up of billions of stars, gas and dust.